Harley-Davidson ModelsSportster
Softail
VRSCDyna GlideRoad KingElectra GlideUltra Classic
The Harley-Davidson "Road King," the "Electra Glide" and the "Ultra Classic." These bikes are all 94 inches long and weigh between 700 and 800 pounds.

Motorcycles are one of the most affordable forms of motorised transport in many parts of the world and, for most of the world's population, they are also the most common type of motor vehicle.There are around 200 million motorcycles (including mopeds, motor scooters and other powered two and three-wheelers) in use worldwide,or about 33 motorcycles per 1000 people. This compares to around 590 million cars, or about 91 per 1000 people. Most of the motorcycles, 58%, are in the developing countries of Asia—Southern and Eastern Asia, and the Asia Pacific countries, excluding Japan—while 33% of the cars (195 million) are concentrated in the United States and Japan. As of 2002, India with an estimated 37 million motorcycles/mopeds was home to the largest number of motorised two wheelers in the world. China came a close second with 34 million motorcycles/mopeds.

Just like people enjoy customizing their cars, people enjoy customizing their Harley-Davidson motorcycles. The customizations can be simple, like putting on a different exhaust system, or they can be radical, like putting on chopper-style forks.
The supply of parts for customization is called the aftermarket. There are thousands of companies producing aftermarket Harley-Davidson parts.
Over time, the Harley aftermarket has grown. Harley-Davidson has helped this process by being slow to change. The aftermarket now produces every single part on a Harley motorcycle in multiple forms: engines, transmissions, frames, forks, brakes, wheels, gas tanks and so on can all be purchased in the aftermarket.